Steroglass is a 50 year old Italian company who has manufactured Roto-Vaps for over 12 years. Their highly engineered products represent substantial improvements to the existing designs found in the marketplace. Together, we offer both a standard 20L unit and a 50L unit; however both versions offer the flexibility of using a wide variety of evaporation vessels. For example, the Strike 5000 as standard uses a 50L but is designed to also use a 100L evaporation vessel and the Strike 2000 can utilize a 6L, 10L or 20L vessel with no other equipment changes required.